Driving and stopping mechanism.



v e. s. HILL. DRIVING AND STOPPING MECHANISM.

APPLICATION FILED NOV. I7. I9I6.

Patented Jan. 21, 1919.

GEORGE S. HILL, OF STRAFFORD, NEW HAMPSHIRE, .ASSIGNOR. BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PA'IERSON, NEW JERSEY, .A. CORPORATION OF NEW JERSEY. V

DRIVING AND STOPPING MECHANISM.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Original application filed September 6, 1913, Serial No. 788,391. Divided and this application filed 1\T ovemher 17, 1916. Serial No. 131,887.

To all whom it may concern:

Be it known that I, GEORGE S. HILL, a

citizen of the United States, residing at Strafi'ord, in the county of Strafiord and State of New Hampshire, have invented certain new and useful Improvements in Driving and Stopping Mechanism; and I do H hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use.

a g the same.

This invention relates to driving and stopping mechanism adapted for use in mashould be stopped in a predetermined position.

chines in which a shaft or driven parts This application is' a division of application Serial No. 788,391, filed September 6,

The object of the invention is to provide novel and improved mechanism for disconnecting the power and stopping the shaft scription of the mechanism or driven parts in a predetermined position which will operate in a uniformly reliable manner without undue shock'or jar, and in H which the return of the stopping devices to stopping relation after they have been dis- 1 engaged in starting the driven parts will nism embodying the invention in its preon line 2, Fig. 1; and Fig. 3 is a detail of ferred form; Fig. 2 is a sectional plan view the stop cam.

The invention is shown embodied in a mechanism for driving a shaft through a single revolution and stopping it in a predetermined position. The mechanism for driving the shaft 2 through a single revolution comprises a pulley 4 loosely mounted on the end of the shaft, and provided with a driving lug 6 adapted to engage the rear side of a lug 8'formed on a cam sleeve 10 .which is secured to the shaft. The pulley tion to bring the driving lug into position to engage the lug 8 by the spring 16. The pulley is normally held in retracted or inactive position against the tension of the spring 16 by a latch lever 18 adapted to engage the end of the shifter rod, and held in position against a pin 20 by a spring 22. When the latch lever is rocked to release the shifter rod, the spring 16 shiftsthe rod so that the pulley 4 is connected with 2 through the lugs 6 and 8. I

The mechanism for stopping the shaft 2 after it has made a single revolution comprises a longitudinally movable rock'shaft the shaft I 24 mounted below and transversely -of the shaft 2, and provided with an upwardly projecting arm 26 which carries a stop pin 28 at its upper end. The shaft 24 is forced in a direction to press the stop pin toward the shaft 2 by a spring 30, the tension. of

which may be regulated by an adjustable" collar 32 through. which the shaft passes. The stop pin is adapted to enter a stopping recess 34 formed in the cam sleeve 10, and

to cooperate with the front side of the lug 8 which forms a stop shoulder 36 at the rear side of the stopping recess. The cam sl eve is provided with an eccentric bra-king cam 38 in advance of the stopping recess 34, against the periphery of which the end of the stop pin rides as a shaft approaches stopping position. The cam sleeve'is also provided with a lateral cam. surface 40 at the side of the braking cam 38 -against which the side of the stopping pin rides,. and which moves the pin laterally or length wise of the shaft 2 into the path of the stopping recess 34 and stop shoulder 36. The rock shaft 24 which carries the stop pin is connected with the-shift rod by a pin 42 I projecting from an arm 44 secured to the shaft, and engaging a slot formed in an arm 46 secured to the shifter rod. The pin also projects into position to engage a stationary stop 48 and limit the movement of the parts stop toward the right under the influence of the cam 40.

In the drawing the parts are shown in stopping position. When the latch 18 is tripped, and the shifter rod 16 is moved toward the left to connect the driving pulley with the driven shaft, the shaft 24: is rocked to move the stop pin toward the left in Fig. 2, thus disengaging it from the stopping recess and moving it out of the path ofthe shoulder 36. This movement of the stop pin frees the shaft, and also brings the pin into the path of the lateral cam 40. During the rotation of the shaft the cam A0 shifts the stop pin toward the right, thus moving the shifter rod 14 to disconnect the driving pulley from the shaft 2, and also moving the stop pin into the path of the stopping recess and stop shoulder 36. Dur ing the latter part of the revolution of the shaft the end of the stop pin rides up the periphery of the braking cam 38., and as the shaft completes its revolution the stop pin enters the stopping recess'34, and the stop shoulder 36 engages the pin and arrests the shaft in fixed position. When the shifter rod is moved toward the right by the action of the cam 40 on the stop pin the latch 18 moves into position to be engaged by the end of the rod, and to retain the parts in stopping position until the latch is again tripped to disengage the stopping device and throw out the bar. In the above construction the stop pin, after being disengaged from the f stoppjngre ess and stop shoulder in starting the shaft 2,- is positively returned into positionto be engaged by the stop shoulder, and to register with the stopping recess, so that there is no danger that the shaft will overrun or will be driven through more than a single revolution.

While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential to the broader features of the invention, and may be varied or modified as found desirable or best suited to the construction of the machine in which it is to be embodied.

Having explained the nature and object of the invention, and specifically described one form of mechanism in which it may be 7 embodied, what is claimed is 1. A driving and stopping mechanism,

'having, in combination, a shaft, a stop shoulder on the shaft, a laterally movable stop pin, a lateral cam onthe shaft, for moving the pin into the path of the stop shoulder, means for simultaneously moving the pin out of the path of the shoulder and into the path of the cam and means for throwing on the power when the pin is moved out of the path of the shoulder, and

for throwing off the power when the pin is moved into the path of the shoulder.

2. A driving and stopping mechanism, having, in combination, a shaft, a sto cam having a circumferential stopping cepression, an eccentric cam surface in advance of the depression, and a lateral cam also in advance of the depression, a stop pin movable radially and also laterally movable from the path of'the stopping depression into the path of the lateral cam surface, and a power shifter connected with the pin.

8. A driving and stopping mechanism, having, in combination, a shaft, a stop shoulder on the shaft, a braking cam in advance of the shoulder, a lateral cam at the side of the braking cam, a stop pin laterally movable from the path of the stop shoulder into the path of the lateral cam, and means for throwing the power on when the stop pin is moved from and off when the stop pin is moved into the path of the stop shoulder.

4:. A driving and stopping mechanism, having, in combination, a power shifter, a shaft, a stop shoulder on the shaft, a stop pin movable lengthwise of the shaft into and out of the path of the shoulder, a cam on the shaft for moving the stop pin into the path of the shoulder and for moving the shifter to throw ofl the power, and means for moving the stop pin from the path of the stop shoulder into the path of the cam and for moving the shifter to throw on the power.

5. A driving and stopping mechanism,

having, in combination, a shaft, a stop cam on the shaft having a stopping depression, a braking cam surface in advance of the depression and a lateral cam surface at the side of the braking surface, a stop pin moV- on when the pin is moved into the path of the lateral cam surface, and to throw the power off when the pin is shifted by said cam surface into the path of the stopping depression.

6. A driving and stopping mechanism, having, in combination, a shaft, a cam'sle'eve on the shaft having a stop shoulder, a stop pin, a lateral cam on the shaft for relatively moving the pin and sleeve lengthwise of the shaft to bring the pin into the path of the stop shoulder, means for relatively moving the pin and sleeve to bring the pin out of the path of the stop shoulder and simultaneously into the path of the cam, and means for throwing on the power when the sleeve and pin are relatively moved to bring the pin out of the path of the shoulder and for throwing off the power when the sleeve pin into the path of the shoulder.

7. A driving and stopping mechanism, having, in combination, a shaft, a cam sleeve on the shaft, a stop cam on the sleeve having a circumferential stopping depression, an eccentric cam surface on the sleeve in advance of the depression, a lateral cam on the sleeve also in advance of the depression, a spring-pressed radially movable stop pin,

Conic: of this patent may be obtained for five cents each, by addressing the means for relatively moving the cam sleeve and stop pin lengthwise of the shaft to bring the pin out of the stopping depression and into the path of the lateral cam surface, and a power shifter connected to be op erated by the relative movement of the pin and sleeve lengthwise of the shaft.

GEORGE S. HILL.

Commissionef of latent.

Washington, D. 0. 

